After applying a patch greater than or equal to Patch 13 on 6.8.1 you are no longer able to edit SQL Nodes that have a valid query.You receive the following dialog when attempting to save:

Cause

This issue is caused by a regression that was introduced in Patch 13.This regression checks to make sure that all variables are encased in double quotes. Variables used to compare numerical values do not require quotes which is why the newly added code now throws an error.

Resolution

Patch 17 for 6.8.1 has the fix ACM-54996 for this issue.

Workaround

To temporarily work around this issue prior to patching you can encapsulate your numeric variables in quotes.